The role of three-gluon correlation functions in the single spin asymmetry

被引：0

作者：

Beppu, Hiroo ^{[1
]}

Kanazawa, Koichi ^{[1
,2
]}

Koike, Yuji ^{[3
]}

Yoshida, Shinsuke ^{[4
,5
]}

机构：

[1] Niigata Univ, Grad Sch Sci & Technol, Niigata 9502181, Japan

[2] Temple Univ, Dept Phys, Philadelphia, PA 19122 USA

[3] Niigata Univ, Dept Phys, Niigata 9502181, Japan

[4] RIKEN, Nishina Ctr, Theoret Res Div, Wako, Saitama 3510198, Japan

[5] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

来源：

4TH INTERNATIONAL WORKSHOP ON TRANSVERSE POLARISATION PHENOMENA IN HARD PROCESSES (TRANSVERSITY 2014) | 2015年 / 85卷

关键词：

DEEP-INELASTIC SCATTERING; HADRONIC PION-PRODUCTION; CHIRAL-ODD CONTRIBUTION; DIRECT-PHOTON; COLLISIONS;

D O I：

10.1051/epjconf/20158502012

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the twist-3 three-gluon contribution to the single spin asymmetry in the light-hadron production in pp collision in the framework of the collinear factorization. We derive the corresponding cross section formula in the leading order with respect to the QCD coupling constant. We also present a numerical calculation of the asymmetry at the RHIC energy, using a model for the three-gluon correlation functions suggested by the asymmetry for the D-meson production at RHIC. We found that the asymmetries for the light-hadron and the jet productions are very useful to constrain the magnitude and form of the correlation functions. Since the three-gluon correlation functions shift the asymmetry for all kinds of hadrons in the same direction, it is unlikely that they become a main source of the asymmetry.

引用

页数：5

共 38 条

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